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发明名称
Extension ladder with hook type fastening
摘要
申请公布号
US2797038(A)
申请公布日期
1957.06.25
申请号
US19560579515
申请日期
1956.04.20
申请人
SOCIETE METROSTATIE S. A.
发明人
TIBERGHIEN ETIENNE
分类号
E06C1/12
主分类号
E06C1/12
代理机构
代理人
主权项
地址
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